#include <iostream>
#include <fstream>
#include <string.h>

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

int isLet(char cev){
    return (cev>'a'&&cev<'z'||cev>'A'&&cev<'Z');
}

int main()
{
    char ceva[1000000];
    fin.getline(ceva,1000000);
    int lungimeTot, nrCuv;
    bool incep=false;
    for(int i = 0;i<strlen(ceva);i++)
    {
        if(isLet(ceva[i])&&incep==false)
        {
            nrCuv++;
            lungimeTot++;
        }
        else if(isLet(ceva[i])&&incep==true)
        {
            lungimeTot++;
        }
        else if(!isLet(ceva[i])&&incep==true)
        {
            incep = false;
        }
    }
    int res = lungimeTot/nrCuv;
    fout<<res;
}